Depremlerde uzun eksenleri doğrultusunda kalıcı yer hareketlerine maruz kalan gömülü boruların davranışı.

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Bibliographic Details
Title:	Depremlerde uzun eksenleri doğrultusunda kalıcı yer hareketlerine maruz kalan gömülü boruların davranışı.
Alternate Title:	Behavior of buried pipes exposed to longitudinal permanent ground deformations in earthquakes.
Authors:	Toprak, Selçuk¹ stoprak@gtu.edu.tr, Nacaroğlu, Engin² enacaroglu@pau.edu.tr, Yağcıoğlu, Berk² byagcioglu13@posta.pau.edu.tr, Çetin, Orhan Alp³ oacetin@dsi.gov.tr
Source:	Journal of the Faculty of Engineering & Architecture of Gazi University / Gazi Üniversitesi Mühendislik Mimarlık Fakültesi Dergisi,. 2025, Vol. 40 Issue 2, p912-922. 11p.
Subjects:	Finite element method, Buried pipes (Engineering), Numerical analysis, Steel pipe, Earthquakes, Deformations (Mechanics)
Abstract (English):	Observations from past earthquakes have shown that pipes are more adversely affected and damaged by ground movements, particularly in the direction of their long axis. Based on this observation, the present study evaluates buried continuous pipelines exposed to ground movement in the direction of the pipe due to earthquakes. Numerical analysis was conducted using the finite element method. Commonly used types of steel pipes in natural gas lines were selected for the analysis, with pipe diameter, mechanical properties of the pipe, burial depth, soil-pipe friction, and ground movement values considered as variable parameters. Additionally, eight different geometrical layouts of the pipes, depending on the condition of the roads and existing structures, were evaluated. The behavior of these pipelines under the influence of permanent ground movements (ranging from 0.01 to 4 meters) was determined for different pipe placement situations. The analysis yielded results for displacements, tensile and compressive deformations, and tensile and compressive stresses in the pipeline. The effects of the varying parameters on the pipe were also determined. The study's results illustrate the behavior of buried steel pipes under different permanent ground movements caused by earthquakes and contribute to the design and preliminary evaluations of buried pipelines by the operating institutions. [ABSTRACT FROM AUTHOR]
Abstract (Turkish):	Geçmiş depremlerden gözlemler, boruların özellikle kendi uzun eksenleri doğrultusunda yer hareketlerinden daha olumsuz olarak etkilendikleri ve hasar görebildiklerini göstermiştir. Bu gözleme bağlı olarak mevcut çalışmada deprem etkisiyle boru doğrultusunda zemin hareketine maruz gömülü sürekli boru hatları değerlendirilmiştir. Sayısal analizlerde sonlu elemanlar yöntemi kullanılmıştır. Analizlerde doğalgaz hatlarında yaygın olarak kullanılan çelik boru cinsi tercih edilmiş, değişken olabilecek parametreler olarak boru çapı, borunun mekanik özellikleri, gömme derinliği, zemin-boru sürtünmesi ve yer hareketinin değerleri alınmıştır. İlave olarak, yolların ve mevcut yapıların durumuna bağlı olarak boruların 8 farklı geometrik yerleşime sahip olmaları da değerlendirilmiştir. Böylece farklı boru yerleşim durumları için düşük seviyeden yüksek seviyeye kadar kalıcı yer hareketleri (0,01-4 m) etkisi altında davranışları belirlenmiştir. Analizler sonucunda, boru hattında meydana gelen yer değiştirmeler, çekme ve basınç şekil değiştirmeleri ile çekme ve basınç gerilmeleri elde edilerek kullanılan parametrelerin boru üzerindeki etkileri belirlenmiştir. Çalışmanın sonuçları, gömülü çelik boruların deprem sonucu oluşabilecek farklı kalıcı yer hareketleri etkisi altında davranışını göstererek uygulamada boru hatlarını işleten kurumlara tasarım ve ön değerlendirmelerinde katkı sağlayacaktır. [ABSTRACT FROM AUTHOR]
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Database:	Engineering Source

Description
Abstract:	Observations from past earthquakes have shown that pipes are more adversely affected and damaged by ground movements, particularly in the direction of their long axis. Based on this observation, the present study evaluates buried continuous pipelines exposed to ground movement in the direction of the pipe due to earthquakes. Numerical analysis was conducted using the finite element method. Commonly used types of steel pipes in natural gas lines were selected for the analysis, with pipe diameter, mechanical properties of the pipe, burial depth, soil-pipe friction, and ground movement values considered as variable parameters. Additionally, eight different geometrical layouts of the pipes, depending on the condition of the roads and existing structures, were evaluated. The behavior of these pipelines under the influence of permanent ground movements (ranging from 0.01 to 4 meters) was determined for different pipe placement situations. The analysis yielded results for displacements, tensile and compressive deformations, and tensile and compressive stresses in the pipeline. The effects of the varying parameters on the pipe were also determined. The study's results illustrate the behavior of buried steel pipes under different permanent ground movements caused by earthquakes and contribute to the design and preliminary evaluations of buried pipelines by the operating institutions. [ABSTRACT FROM AUTHOR]
ISSN:	13001884
DOI:	10.17341/gazimmfd.1292744